Ignition review

Ignition is a client engagement and commerce platform built for accounting firms and other professional services businesses, and its pitch is disarmingly practical: stop separating the agreement from the payment. In Ignition, the proposal, the engagement letter, and the client's payment authorization are one flow. The client reviews the proposal, signs, and enters payment details in a single sitting, and from that point billing runs automatically. More than 8,500 firms use it to close the gap between winning work and getting paid for it.

What Ignition actually does

The workflow starts with proposals. You build service packages, often in good-better-best tiers that make upselling natural, and send a polished online proposal with the engagement letter attached. When the client accepts, they sign digitally and provide payment details upfront, before any work begins. That last step is the structural fix for the oldest problem in professional services: doing the work, then chasing the invoice.

From there, Ignition automates the billing lifecycle. Recurring engagements bill on schedule without anyone raising an invoice manually; one-off projects collect on completion or on the agreed terms. Invoices and payment records sync into Xero or QuickBooks, so the ledger stays clean without double entry, and practice management integrations like Karbon can spin up jobs automatically when a proposal is accepted. A reporting layer shows pipeline, projected revenue, and client lifetime value, and the newer AI price insights feature benchmarks your pricing to flag services you are undercharging for, which is quietly one of the highest-leverage features in the product given how systematically accountants underprice.

Key features

• Online proposals with tiered packages and built-in upsell options
• Digital engagement letters and contracts with e-signature
• Payment details captured at signing, before work begins
• Automated recurring and one-off billing with no manual invoicing
• Invoice and payment sync to Xero and QuickBooks
• AI price insights for benchmarking and repricing services
• Integrations with Karbon, Gusto, ProConnect, Zapier, and Slack
• Revenue forecasting and pipeline reporting

Who it's for

Ignition is squarely aimed at accounting, bookkeeping, and tax firms running recurring client engagements, and it extends naturally to agencies, consultants, and financial advisors with similar billing patterns. The firms that gain most are those with dozens to hundreds of clients on monthly services, where manual invoicing and unsigned engagement letters quietly leak revenue and create scope-creep headaches. A solo practitioner with five clients on annual letters can run it, but the automation payoff scales with client count and billing frequency.

How it compares

The closest competitor in the accounting world is GoProposal, which is strong on structured pricing logic and consistency, while Ignition is broader on the payments and billing automation side; GoProposal historically leans on a separate tool for collection, whereas payment capture is the center of Ignition's design. Generic proposal software like PandaDoc or Proposify can produce a prettier document for one-off deals, but neither understands recurring engagements, scope-based engagement letters, or ledger sync the way a purpose-built accounting tool does. If your billing is genuinely one invoice per year per client, your ledger software alone may be enough, and that is the honest threshold for whether Ignition earns its subscription.

Verdict

Ignition wins because it fixes a money problem, not a document problem. Capturing payment authorization at signing changes firm cash flow in a way no proposal template can, and the automation around recurring billing, ledger sync, and engagement renewals compounds from there. The costs are real: no free plan, and the implementation forces you to standardize services and pricing, which is work, even if it is work most firms need to do anyway. For any accounting or bookkeeping firm billing clients monthly, Ignition is about as close to a default recommendation as this category has.